D31 DIFFERENTIAL PRESSURE TRANSMITTER

The model D31 Differential Pressure Transmitter is suitable for measuring pressures from -100mbar to 70bar with maximum working pressures up to 413 bar.

The D31 SMART Differential Pressure Transmitters are suitable for measuring differential pressure of gases, vapours and liquids. The active sensing element is a piezoresistive silicon sensor separated from the medium by a diaphragm and by a specially selected type of manometric liquid.  The special design of the active sensing element ensures that it is able to withstand pressure surges and overloads of up to 250/320/413 bar. The casing is made of cast aluminium alloy or 316 stainless steel with degree of protection IP66/IP67. The design of the casing enables the use of a local display, rotation of the display by 90°, rotation of the casing by 0–355° relative to the sensor, and a choice of cable direction.

ATEX certified for use in Zone 0/20 and Zone 1/21 Hazardous Areas and available with 316L, Hastelloy C 276 or Gold wetted parts materials, the D31 SMART Differential Pressure Transmitters are suitable for use in a wide range of applications whether for measuring differential pressure, level or flow.

When fitted with a direct diaphragm seal on the Hi side of the transmitter (image on left), the D31 can be used for measuring level in open tanks.

One unique feature of all models in the D-Series is the backlit LCD display which facilitates local monitoring in light deficient environments by enhancing display visibility (move your mouse cursor over the image below to illuminate display). 

The D-Series can also be supplied with Delta’s user-friendly ‘D-Soft’ remote communication software.  Using the HART communication protocol, this software provides users with a convenient way to calibrate, configure and monitor the instrument by connecting it to a PC via Delta’s USB/Bluetooth to HART converter.

D-Soft features include:

• Identification of individual transmitter
• Configuration of output parameters
• Readings of currently measures values
• Enforcement of output current with a given value
• Transmitter calibration
• Zeroing